How to calculate Liuhe with iron abacus?

Iron abacus is a traditional calculation tool, which is used for mathematical calculation and arithmetic operation. For me, the iron abacus can't directly calculate the specific results, but it can be referenced and predicted by some methods. 1. Use the digital beads on the iron abacus to calculate the basic numbers. An iron abacus generally has ten digital beads, and the basic numbers can be obtained by arranging the results of these digital beads. 2. Use the digital beads on the iron abacus for multiplication or addition. Multiply or add different digital beads, and the result may be related to the result in a certain period. 3. Use the special function of iron abacus. In addition to digital beads, there are some beads with special functions on the iron abacus, such as God of Wealth and Peace Beads. According to different beliefs and traditions, we can make predictions according to the arrangement of these special functional beads. It should be noted that it is a result generated by random numbers, and there is no fixed calculation method to accurately predict the result. The use of iron abacus is only a reference way, and it can't determine the basis of purchase.